Organ-shutter-operating mechanism.



J. T. AUSTIN.

ORGAN SHUTTER OPERATING MECHANISM.

APPLICATION FILED ]ULY8.1915.

1,173,405. Patented Feb.29,1916.

I Q \A/ 20 x 17 f la; $5 1 7 THE COLUMBIA PL\Y -IOGRAPH cc., WASHINGTON; b. c.

ll l TED STATES PATENT JOHN T. AUSTIN, OF HARTFORD, CONNECTICUT, ASSIGNO COMPANY, OF HARTFORD, CONNECTICUT, A COREORATI N F LAINE.

TO AUSTIN ORGAN Ft \I Specification of Letters IPatent.

Patented Feb. 2.9 1916.

Application filed. July 8, 1915. Serial No. seer-r.

To all whom it may, concern.

Be it known that I, JOHN T. AUs'rIN, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Organ- Shutter-Operating Mechanism, of which the following is a specification.

This invention relates to what I shall for convenience term organ-shutter-operating mechanism.

While as may be inferred the apparatus can be used successfully in many different connections, it is of especial utility when employed for causing the opening or closing of a shutter or shutters such as form part of the equipment of a pipe organ.

Among the principal objects of the invention is the provision of means of a simple and effective nature by which a shutter or shutters can be opened or closed pneumatically; that is to say, no springs are necessary to obtain such functions.

In the drawings accompanying and form ing part of the present specification I have shown in detail one of the several convenient forms of embodiment of the invention which to enable those skilled in the art to practice the same will be set forth fully in the following description. I do not restrict myself to this particular disclosure; I may depart therefrom in several respects within the scope of the invention defined by the claims following said description.

Referring to said drawings: Figures 1 and 2 are cross sectional views of organ shut ter-operating mechanism involving my in vention, the shutters being open in Fig. 1 and closed in Fig. 2, the parts of the mechanism being, as will be understood in difierent positions.

Like characters refer to like parts in both views.

As I have noted I provide a construction wherein a part such as a shutter can be moved oppositely pneumatically. In the present case these functions are secured by pressure, means being provided in the present case whereby a shutter can be closed when desired or opened if required. In an organ there are several of these shutters which are usually pivotally mounted. In Figs. 1 and 2 a plurality of such shutters is illustrated. Each shutter is designated by 2, is pivotally mounted, and is equipped 'walls.

with a crank arm as 3 pivoted to an actuator as 4. VJ hen the actuator (shown as a rod) is thrust upward, the shutters are simultaneously opened as indicated in Fig. 1, whereas when the actuator rod is pulled downward the shutters closed as indicated in Fig. 2. This is a well-known shutter mount and actuator and, therefore, requires no further description. As represented the rod 4 extends through the top of an air-box 5, the rod where it enters the box being surrounded by the pouch 6. Compressed air is delivered for example by a fan or blower (not shown) into the box by way of the ductor' pipe 7 shown as extending into the bot tom thereof.

As a suitable means for effecting the operation of the shutters, the bellows 8 may be provided. This bellows is practically identically like that shown and described in detail in Letters Patent 1,090,963 granted to me March 24, 1914, and to which reference may be had. Its swinging board is shown connected by a link as 9 with one arm of the angle lever 10, the other arm of said angle lever bei n jointed to the rod 1 within the air-box 5. The angle lever is suitably supported for swinging movement at its elbow inside said box. The bellows is supported by the walls 11 and 1 having a port 13 opening into the chamber 14 between said The chamber 14- is connected with the atmosphere by way of the port 15 in the wall 11, while the wall 12 has a port 16 between said chamber and the interior of the box 5. Extending through the chamber 1i and through the ports 15 and is the stem 17 sustained for sliding movement by guide brackets as 18 and 19. The stem has fixed hereto the valve 20 controlling the port 15 and fastened to said stem outside the box. In addition to this said stem has fixed thereto a second valve 21 inside the box, and controlling the port 16 from the exterior of he chamber 14. Fastened to the inner end of the stem is the armature 22 for the magnet 23 inclosed in the circuit 24 governed by the switch 25 exactly as shown in the prior Letters Patent to which I have already referred.

In one side of the box 5 is an opening 26 covered by the flexible diaphragm 27 of suitable material. To this diaphragm 26 is approximately centrally connected the stem 28 pivoted or otherwise suitably jointed to the swinging member of the bellows 8.

' 27 for a reason that will be hereinafter obvi- The superficial area of said swinging member is greater than that of the diaphragm ous.

It will be clear that normally there is pressure in the box 5 and that the circuit 24 is normally open, the consequence being that the pressure in the box 5 will cause the bellows 8 to collapse and to hold the valve 21 against its seat around the port 16 as shown in Fig. 2, the diaphragm 27 being bowed inward as shown in said Fig. 2.

t will be clear at this time that the rod 4: is in its lowered position, and the shutters 2 closed. To open the shutters the switch 25 is closed, thus causing the energization of the magnet 23, so that the latter will attract its armature 22 and thereby move the valves 20 and 21 inward as shown in Fig. 1. This results in putting the chamber 14 and therefore the bellows 8 into communication with the interior of the box 5. At the same time the valve 20 is caused to close the port 15, and thereby cut off the bellows 8 from the atmosphere. Simultaneously the pressure in the box 5 acting against the diaphragm 27, bows the latter outward as shown in Fig. 2, thus expanding the bellows and through the described parts simultaneously opening the shutters 2.

hat I claim is:

1. The combination of a shutter, an airbox, a bellows, means for putting said bellows into communication with the air box or with the atmosphere, the air box having an opening, and a diaphragm covering said opening and operatively connected with, the bellows, the superficial area of the diaphragm being less than that of the bellows and the latter being operatively connected with said shutter.

2. The combination of a shutter, an airbox, a bellows in said air-box, means for. putting said bellows into communication with the air-box or with the atmosphere, the air-box having an opening, and a diaphragm covering said opening and operatively connected with the bellows, the superficial area of the diaphragm being less than that of the bellows and the latter being operatively connected with said shutter.

3. The combination of a shutter, two pneumatically operative devices operatively connected with each other and with the shutter and of different superficial areas, and means for causing the action pneumatically of said devices in alternation to thereby cause the opening and closing of the shutter in alternation.

4. The combination of a shutter, an air box, a bellows in said air box. means for putting said bellows in communication with the air box or with the atmosphere, the air box having an opening, a diaphragm covering said opening, the superficial area of the diaphragm being less than that of the movable member of the bellows, a connection between the movable member of the bellows and the diaphragm, and an operative connection between said movable bellows and said shutter.

5. Shutter-operating mechanism comprising an air box, a bellows in said air box, means for putting said bellows in communication with the air box or with the atmosphere, the air box having an opening, a diaphragm covering said opening, the superficial area of the diaphragm being less than that of the movable member of the bellows, and an operative connection between the movable member of the bellows and the diaphragm.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN T. AUSTIN.

Witnesses:

T. MAY NORRIS, HEATH SUTHERLAND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

